For a
short time late in the 1st series or early in the 2nd, Kenner released a
handful of 2-packs. They sold for about $3.99 and allowed you to get the
other figures in the show without buying the vehicles. My guess is these were
released early in the 2nd series because all of the figures have the
re-designed masks, and were characters not available with the new vehicles.

These
were similar to the Figure Packs, but featured a single character with some small
accessories. The 1st 4 were readily available here, but the 2nd "Mystery
Adventure" packs were only released in Europe.

I
managed to get my hands on some Spanish figures from Argentina. Man, are they
crappy. They're called "Munecos Articulados" -- and they're an
exercise in how many times you can re-paint the same figure. Most of them are
repaints of Ace Riker from Slingshot. If not, they almost all have his mask.

These four
packs were released only in Europe. Interestingly, the background artwork is
from the Racing series, but all the figures are re-paints of the 2nd gen
characters. Perhaps again, a way to get figures that were no longer
available...